3979889761 has 2 divisors, whose sum is σ = 3979889762. Its totient is φ = 3979889760.

The previous prime is 3979889747. The next prime is 3979889779. The reversal of 3979889761 is 1679889793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3939947361 + 39942400 = 62769^2 + 6320^2 .

It is a cyclic number.

It is not a de Polignac number, because 3979889761 - 2²⁹ = 3443018849 is a prime.

It is not a weakly prime, because it can be changed into another prime (3979889161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989944880 + 1989944881.

It is an arithmetic number, because the mean of its divisors is an integer number (1989944881).

Almost surely, 2^3979889761 is an apocalyptic number.

It is an amenable number.

3979889761 is a deficient number, since it is larger than the sum of its proper divisors (1).

3979889761 is an equidigital number, since it uses as much as digits as its factorization.

3979889761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41150592, while the sum is 67.

The square root of 3979889761 is about 63086.3674734883. The cubic root of 3979889761 is about 1584.7363300716.

The spelling of 3979889761 in words is "three billion, nine hundred seventy-nine million, eight hundred eighty-nine thousand, seven hundred sixty-one".